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SDO_Model_Type::isInstance — Test for an SDO_DataObject being an instance of this SDO_Model_Type
此函数是实验性的。此函数的表象，包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本函数风险自担 。
Test for an SDO_DataObject being an instance of this SDO_Model_Type.
Returns TRUE if the SDO_DataObject provided is an instance of this
SDO_Model_Type, or a derived type, otherwise returns FALSE.
data_objectThe SDO_DataObject to be tested.
Returns TRUE if the SDO_DataObject provided is an instance of this
SDO_Model_Type, or a derived type, otherwise returns FALSE.